Fluid pump



c. w. JOHNSON ET AL 2,789,513

FLUID PUMP April 23, 1957 2 She'ets-Sheet 2 Filed Dec. 22, 1955III/I/Illlll II II:

mm EZIEUTLTLJT INVENTORS Cf/EJfEB Ml/fl/M/SO/l w m K .M F e 0 E A e aUnited States Patent "ice FLUH) PUMP Chester W. Johnson, Butte, andClarence T. Keogh,

Whitehall, Mont.

Application December 22, 1955, Serial No. 554,759

3 Claims. (Cl. 103-136) The present invention relates to fluid pumps.

An object of the present invention is to providea fluid pump which isdouble acting and reversible, and one which may be used as a fluidmotor.

Another object of the present invention is to provide a fluid pump ofthe rotor and vane type which has means for preventing the wear on theends of the vanes normally encountered in rotor and vane pumps.

A further object of the present invention is to provide a fluid pump ofsimple structure, one sturdy in construction, one economical tomanufacture and assemble, and one which is highly eflicient in action.

These and other objects and advantages of the present invention will befully apparent from the following description when taken in connectionwith the annexed drawings, in which:

Figure 1 is an elevational view of the fluid pump of the presentinvention, with the front cover partially broken away and with a portionin section,

Figure 2 is a sectional view taken on the line 2-2 of Figure 1,

Figure 3 is a sectional view, on an enlarged'scale, taken on the line3--3 of Figure 2,

Figure 4 is a sectional view taken on the line 4-4 of Figure 3,

Figure 5 is a sectional view, on an enlarged scale, taken on the line 55of Figure 2, and

Figure 6 is an exploded view of the components of the fluid pump of thepresent invention.

Referring in greater detail to the drawings in which like numeralsindicate like parts throughout the several views, the fluid pump of thepresent invention comprises a closed cylindrical housing 10 havingdiametrically opposed abutments 11 and 12 on the inner surface of thewall of the housing 10. The housing has a front wall 13 and a rear wall14. A shaft 15 is journaled in the rear wall 14 and has an end portion16 axially disposed in the housing 10. A rotor 17 provided with ahollowedout end face is circumposed about the shaft end portion 16 andis fixedly secured thereon for rotation with the shaft 15. The rotor 17is fixed to the shaft end portion by means of a key 18, shown in dottedlines in Figure 2, and by means of a nut 19, the shaft end portion 16having suitable threads thereon for receiving the nut 19. The rotor 17wipingly contacts the abutments 11 and 12 successively as it rotates.The rotor 17 is provided with a plurality of slots 20 which extend inradial spaced relation about the rotor 17.

A fixed shaft 21 projects perpendicularly from the inner surface of thefront wall 13 of the housing 10 and extends into the rotor 17. A tubularmember 22 is supported on the fixed shaft 21 for rotation about thelatter as an axis.

A plurality of sleeves 23 are disposed in side by side relation alongthe tubular member 22. Eccentric means is provided on the tubular member22 connecting each of the sleeves 23 to the tubular member 22 so as toprovide eccentric bearing portions on the tubular memher for independentrotational movement therearound' The eccentric means embodies aplurality of circular bearing surfaces 24, six in number, each disposedeccentrically with respect to the shaft end portion 16 and with respectto each other.

A vane 25 projects radially from each sleeve 23 and is pivotallyconnected thereto by means of a socket 26 on the inner end of the Ivane25 and a ball formation 27 received in the socket 26. The ball formation27 is on the outer end of an arm 2'8 which projects from the associatedsleeve 23. The socket 26 .and the ball formation 27 permit pivotalmovement of the vane relative to the arm 28 and therefore relative tothe sleeve 231 Each of the vanes 25 is slidably mounted in one of theslots 20 of the rotor 17. 1

Means is provided operatively connected to the tubular member 22 foreffecting the rotation of the tubular member 22 in a direction oppositeto the direction of rotation of the shaft 15. Specifically, such meanscomprises a spur gear 29 secured to or formed integrally with the baseportion 30- of the tubular member 22. A pair of stub shafts 31, eachprovided with a threaded end .por-n tion and a slotted head, areth-readedly secured to the front Wall 13 of the housing 10 and eachsupports a pair gears 32 is in mesh with the spur gear 29 and the spurgears 33 are in mesh with a ring'gear 34 which is provided on theadjacent portion of the rotor 17.

An inlet 35 and an outlet 36 arearranged in spaced relation in theportion of the wall of the housing 10 on each side of and between theabutments 11' and 12. The part of the housing wall between theadjacentinlet 35 and the outlet 36 and the adjacent portion of the rotor17 defines a pump chamber. The inlets 35 and 36 are shown in dottedlines in Figure 1.

In operation, the shaft 15 is connected to a sourceof rotative power,theinlets 35 are connected to a fluid source, and the outlets 36 areconnected to a point of discharge for the fluid. Upon rotation of theshaft 15 in one direction, the gears 29, 32, 33, and 34 cause thetubularmember 22 to rotate in the other direction and at the same rotationalspeed as the rotor17. The vanes 25 are carried by the rotor as thelatter rotates and each successively extends into the pump chambersclosing the latter and effecting a pumping action therein. Thedimensions of the sleeves and the vanes and the connecting arms are suchthat the vanes do not bear against the inner surface of the housing 10but have a close tolerance therewith. Due to the fact that the sleeves23 are carried about the tubular member 22 and rotate about axes whichare eccentric with respect to the rotor 17 and with respect to eachother, the pivotal connection of the ball formation on the end of eacharm 28 and the socket 26 on the vanes 25 permits a limited swingingmovement, as shown in Figure 5 and indicated in the dotted lines, of thevanes with respect to their associated sleeves. The pump chambers aredesignated by the reference numerals 37 and 38 on the right and leftsides of Figure 1, respectively. Flat-headed bolts 39 secure the rearwall 14 and the front wall 13 to the housing 10.

What is claimed is:

1. A fluid pump comprising a closed cylindrical housing havingdiametrically opposed a'butments on the inner surface of the wallthereof, a shaft rotatable in one direction and having an end portionaxially disposed in said housing, a hollow rotor circumposed about saidshaft end portion and connected to the latter for rotation therewith,said rotor in its rotational travel successively wipingly contactingsaid housing abutments, there being a plurality of slots in said rotorextending in radial spaced relation therearound, a fixed shaft car-Patented Apr. 23, 1957 outlets ried by said housing and extending intosaid rotor, a tubular member supported on said fixed shaft for rotationabout the latter as an axis, a plurality of sleeves disposed in side byside relation along said tubular member. and connected to said tubularmember so as to provide eccentric bearing portions on said tubularmember, .11 vane projecting radially from each of said sleeves andslidable in a slot of said rotor, means operatively connected to saidtubular member for effecting the rotation of the latter in a directionopposite to the direction of rotation of said rotatable shaft, and aninlet and an outlet arranged in spaced relation in the portion of thewall of said housing on each side of and between said abutments, theparts of the inner surface of the housing wall between the adjacentinlet and outlet being spaced from the adjacent portion of said rotordefining a pump chamber, said vanes successively extending into andclosing each of said pump chambers in turn upon execution of therotational travel of said rotor.

2. A fluid pump comprising a closed cylindrical housing havingdiametrically opposed abutments on the inner surface of the wallthereof, a shaft rotatable in one direction and having an end portionaxially disposed in said housing, a hollow rotor circumposed about saidshaft end portion and connected to the latter for rotation therewith,said rotor in its rotational travel successively wipingly contactingsaid housing abutments, there being a plurality of slots in said rotorextending in radial spaced relation therearound, a fixed shaft carriedby said housing and extending into said rotor, a tubular membersupported on said fixed shaft for rotation about the'latter as an axis,a-plurality of sleeves disposed in side by side relation along saidtubular member, an eccentric means on said tubular member connectingeach of said sleeves to said tubular member so as to provide eccentricbearing portions for independent rotational movement therearound, a vaneprojecting radially from each of, said sleeves and slidable in a slot ofsaid rotor, means operatively connected to said tubular member foreffecting the rotation of the latter in a direction opposite to thedirection of rotation of said rotatable shaft, and an, inlet andan-outlet arranged in spaced relation in theportion of the wall of saidhousing on each side of and between said abutments, the parts of theinner surface of the housing wall between the adjacent inlet andoutletbeing spaced from the adjacent portion of said 4 rotor defining apump chamber, said vanes successively extending into and closing each ofsaid pump chambers in turn upon execution of the rotational travel ofsaid rotor.

3. A fluid pump comprising a closed cylindrical housing havingdiametrically opposed abutments on the inner surface of the wallthereof, a shaft rotatable in one direction and having an end portionaxially disposed in said housing, a hollow rotor circumposed about saidshaft end portion and connected to the latter for rotation therewith,said rotor in its rotational travel successively wipingly contactingsaid housing abutments, there being a plurality of slots in said rotorextending in radial spaced relation therearound, a fixed shaft carriedby said housing and extending into said rotor, a tubular membersupported on said fixed shaft for rotation about the latter as an axis,a plurality of sleeves disposed in side by side relation along saidtubular member and connected to said tubular member so as to provideeccentric bearing portions on said tubular member, a vane projectingradially from each of said sleeves and pivotally connected thereto andslidable in a slot of said rotor, means operatively connected to saidtubular member for effecting the rotation of the latter in a directionopposite to the, direction of rotation of said rotatable shaft and atthe same rotational speed as said rotatable shaft, and an inlet and anoutlet arranged in spaced relation in the portion ofthe wall of saidhousing on each side of and between said abutments, the parts of theinner surface of the housing wall between the adjacent inlet and outletbeing spaced from the adjacent portion of said rotor defining a pumpchamber, said vanes successively extend-. ing into and closing each ofsaid pump chambers in turn upon execution of the rotational travel ofsaid rotor.

References Cited in the file of this patent UNITED STATES PATENTS461,612 Nichols Jan. 26,1892 1,104,331 Tree July 21, 1914 1,852,503Campbell Apr. 5, 1932 1,922,797 Eyston Aug. 15, 1933 23 11,139 BallardAug. 13, 1935 2,071,258 Haydock et al. Feb. 16, 1937 2,124,918 HansonJuly 26, 1938

